Swing



H. c. KENT March 25, 19,58

SWING Filed. Nov. 26, 1956 Inumlbr 3 spindle again, but in the oppositedirection to that in which it was previously wound. As the movement ofthe swing in its initial direction comes to an end, and said swingcommences, under the action of gravity, to move in the oppositedirection, the driving bar 12 is again depressed by way of'its footreststo unwind the strap 9 once again from the propeller spindle 6, butduring this movement the propeller is rotated in the opposite directionto that in which it rotated initially, due to the fact that the strip 9has been wound round said spindle in the opposite direction to that inwhich it was initially wound. Consequently during this second swingingmovement of the swing, the propeller imparts a driving force to theswing which is directed inthe same direction of movement as that whichthe swing has now adopted under the action of gravity. Due to theabovedescribed automatic reversal of the direction in which the strap 9is wound on the propeller spindle 6 at the end of each depression of thedriving bar 12, and to the automatic raising of the driving bar duringre-winding of the strap on said propeller spindle, each actuation of thepropeller 8 thus'automatically ensures that it is set for a subsequentrotation in the correct direction, that is to assist the new directionof movement of the swing on each reversal of movement of said swing.

If desired a hand grip may be provided on the elongated beam 1 forwardlyof the seat, in order to provide a steady hold for a person occupyingsaid seat and in fact, in the swing shown in the drawing, the bracket 4itself serves this purposes. The degree of swinging movement of theframework may clearly be governed by the force with which the drivingbar 12 is pressed downwardly by the person occupying the seat, and theextent of angular movement of said driving bar may, if desired, berestricted both at the upper and at the lower limits by the provision ofsuitable stops; It will be appreciated that when the momentum of thepropeller 8 winds the strap around the propeller spindle 6, when thedriving bar 12 reaches its upper limit of movement, there can be aconsiderable pull exerted on said strap, and it is 'for this reason thatthe springs 15 are arranged between the lower end of the strap and itseffective point of fastening to the forward end region of the drivingbar.

The framework of the swing may, if desired, be covered by or form a partof any desired outer body, such as a vehicle, ship or aircraft body, andfor added realisation the body may include ground wheels, wings or thelike details.

A smoother operation of the propeller may be obtained by providing onthe spindle 6, a flat allowing the rod to be received therein bycarrying said rod on appropriately shortened split keys 11. This enablesthe strap 9 to be wound on the spindle 6 in a more balanced manner.

,I claim: t

*1. A swing comprising a pivotally suspended framework, a rotatablespindle carried by said framework, a propeller .carried by said spindle,a driving bar pivotally connected to said framework, and a flexiblestrap connected atone end to said spindle and connected at its oppositeend to said driving bar, the connection between said one end of saidstrap and said spindle permitting said strap to wind around said spindleand to unwind from said spindle and said spindle being rotatable inresponse to unwinding movement of said strap whereby, when saidstrap ismoved in response to movement of said driving bar, said strap may unwindfrom and rotate said spindle to thereby rotate said propeller;

2. A swing comprising an elongated beam having a forward end and a rearend, a pair of spaced-apart transverse spars carried by said beam, therebeing a spar adjacent each end of said beam, an inverted U-shapedbracket carried by each spar, the bracket adjacent the rear end of saidbeam having legs extending downwardly below said beam, a shaft connectedto and extending horizontally between said downwardly extending legs, anelongated driving bar having one end pivotally connected to said shaft,a rotatable spindle carried by said beam at the forward end of saidbeam, a propeller carried by and rotatable with said spindle, and anelongated flexible strap having one end connected to said rotatablespindle and its opposite end connected to said driving bar, theconnection between said one end of said strap and said spindlepermitting said strap to wind around said spindle and unwind from saidspindle, and downward movement of said driving bar with respect to saidbeam causing said strap to unwind from and rotate said spindle tothereby rotate said propeller. t v

3. A swing comprising an elongated beam, elon gated driving bar, meanscarried by said beam pivotally connecting one end of said driving baradjacent one end of said beam, the other end of said driving bar beingfree to move in an arcuate path of movement, means connected to theopposite end of said beam rotatably supporting an elongated spindle, apropeller carried by said spindle, a flexible strap having one endconnected to said spindle to permit said strap to wind around saidspindle and unwind from said spindle, said spindle being rotatable inresponse to movement of said strap when said strap is unwound from saidspindle, and resilient means connecting the other end of said strap tosaid free end of said driving bar, said resilient means provid ing ashock-absorbing connection between said other end of said strap and'saiddriving bar.

4. A swing comprising an elongated framework, an elongated driving barpivotally connected at one end to said framework adjacent one end ofsaid framework, said driving bar extending downwardly with respect tosaid framework and having a lower end positioned beneath the forward endof said framework, said framework including a U-shaped bearing bracketat the forward end of said framework, a spindle journalled in saidbracket, a propeller carried by said spindle, said framework alsoincluding a pair of spaced-apart transverse sparsproviding suspensionmeans for the swing, and a flexible strap having one end connected tosaid spindle 'and its other end connected to said driving bar lower end,the connection between'said spindle and one end 7 of said strappermitting said strap to wind around said spindle and unwind from saidspindle, and said spindle being rotatedrby' said strap when said strapmoves in response to downward movement of said driving bar.

5. A swing according to claim 4 including a rod positioned adjacent toand parallel to said spindle, and a pair of keys connecting said rod tosaid spindle, said strap having an upper end connected to said rod andsaid rod being rotatable with said spindle to wind said strap aroundsaid spindle and said rod.

References Cited in the tile of this patent UNITED STATES PATENTS

